メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.772538647042 35.0806771136701, 136.770970737061 35.0810987993184, 136.770996108462 35.0806023183704, 136.771047433989 35.079056172405, 136.772617808982 35.079098314144, 136.772602496521 35.0792017884976, 136.772564618916 35.0798355556066, 136.772516468357 35.0805759115189, 136.772538647042 35.0806771136701)) ^^http://www.opengis.net/ont/geosparql#wktLiteral